Question Sidemount with Shearwater Peregrine TX AI - lost connection

[thescubamarc]

Dear community. I'm diving sidemount with 2 steel cylinders 12l, on both of them I have a Shearwater Swift transmitter. On every dive my Peregrine TX (right wrist) loses the connection to the Swift from the left tank. This happens also when I don't wear a heating west, so interference shoudn't be the issue.
Does anyone else experienced this problem?
I tested them on land - they both have the same range, around 1.5 meters.

Thanx for your help!

 

[pdwh]

I'm diving the same computer, transmitters, and computer position and have never had a major issue with it. I get an occassional disconnect because the distance to transmitter is further, especially if I move my arm farther away from the left tank, but when I have my hands clasped in front of me in proper trim, it's not an issue. Does it lose connection and stay disconnected, or does it quickly reconnect if you move your arm over a bit? Is it for an entire dive? Does it happen at a certain depth or just randomly?

 

[Mobulai]

I tested them on land - they both have the same range, around 1.5 meters.

Ofcourse this drops in water to maybe 50cm

Not on a Perdix (or even a Shearwater), but I have had similar issues with transmitters and SM before when I had them right by the 1st stage
Since then I added short HP hoses, route the Tx hose around the tank neck to the front side of the tank and catch the it by a bungee so it’s as close as possible to the computer (also so they don’t flap around and keep banging)
Only when I stretch my left arm (computer arm) all the way away that I lose connection to the right Tx (but I barely can even read the computer then)

 

[Divin'Papaw]

Dear community. I'm diving sidemount with 2 steel cylinders 12l, on both of them I have a Shearwater Swift transmitter. On every dive my Peregrine TX (right wrist) loses the connection to the Swift from the left tank. This happens also when I don't wear a heating west, so interference shoudn't be the issue.
Does anyone else experienced this problem?
I tested them on land - they both have the same range, around 1.5 meters.

Thanx for your help!

Loses connection permanently until the dive is over, or just a temporary drop out of 3-5 seconds?

If you are permanently losing connection, contact Shearwater. If it is a temporary drop out, I get that on occasion. I believe it is just interference, and the SWIFT will then adjust poling interval to avoid the interference and re-establish the connection. I never lose connection for more than maybe 5 seconds and that is rare. The only times I've permanently lost connection on a computer, it was my old Perdix AI and it was due to a circuit board failure on the computer. The computer had to be replaced with a Perdix 2 in this case because the circuit boards for the Perdix AI are no longer manufactured.

 

[inquis]

Have you tried a new battery in the problem transmitter?

 

[thescubamarc]

I'm diving the same computer, transmitters, and computer position and have never had a major issue with it. I get an occassional disconnect because the distance to transmitter is further, especially if I move my arm farther away from the left tank, but when I have my hands clasped in front of me in proper trim, it's not an issue. Does it lose connection and stay disconnected, or does it quickly reconnect if you move your arm over a bit? Is it for an entire dive? Does it happen at a certain depth or just randomly?

Thanx so much for your answer. no, it only loses connection for a short time, then reconnects. but i think it's annoying
i'll try a short hose and a bungee to bring the transmitter more to the front...

 

[thescubamarc]

Have you tried a new battery in the problem transmitter?

yeah. batteries are fine. but i think its just the distance to the computer...

 

[thescubamarc]

Ofcourse this drops in water to maybe 50cm

Not on a Perdix (or even a Shearwater), but I have had similar issues with transmitters and SM before when I had them right by the 1st stage
Since then I added short HP hoses, route the Tx hose around the tank neck to the front side of the tank and catch the it by a bungee so it’s as close as possible to the computer (also so they don’t flap around and keep banging)
Only when I stretch my left arm (computer arm) all the way away that I lose connection to the right Tx (but I barely can even read the computer then)

Thanx, i'll try that on my dives on the weekend!

 

[pdwh]

Thanx so much for your answer. no, it only loses connection for a short time, then reconnects. but i think it's annoying
i'll try a short hose and a bungee to bring the transmitter more to the front...

You're not going to avoid that with any computer/transmitter combo, regardless of brand. Garmin is supposed to have better range but they have other issues and cost more. The short hose may help a bit but won't completely eliminate it. Water is just not a good transmission medium for radio signals at any frequency.

 

[Divin'Papaw]

You're not going to avoid that with any computer/transmitter combo, regardless of brand. Garmin is supposed to have better range but they have other issues and cost more. The short hose may help a bit but won't completely eliminate it. Water is just not a good transmission medium for radio signals at any frequency.

I tend to agree. It happens on occasion and is just a result of the technology involved. It isn't an issue and honestly, I hardly even notice when it happens anymore. I also dive with two computers and when it occasionally happens, it never seems to occur with both computers as the same time. I believe that is because they are always on different poling intervals.